JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 24
·期 3
·545-555
·
IF 2.646
Pan Yufu,Luo Yanfang,Li Chengcheng,Wang Rongjing,Yuan Yihao,Li Meng,Na Ping
The present study focused on the preparation, characterization, and application of cerium (Ce) and neodymium (Nd) co-doped lead (PbO 2 ) electrode, i.e., Ti/SnO 2 -Sb 2 O 3 /α-PbO 2 /Ce-Nd-β-PbO 2 . The electrochemical activities of the modified electrode were investigated and compared with those of Ce-PbO 2 , Nd-PbO 2 , and pure PbO 2 electrodes. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the surface morphology, crystal structure, and elemental states of the modified electrode. The Ce and Nd co-doped PbO 2 electrode had smaller crystal particles, more compact structure, and higher activity of electrocatalysis compared with the single-doped and undoped PbO 2 electrodes. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) were also utilized to study the electrochemical response of the modified electrodes. The results show that the prepared Ce-Nd-PbO 2 electrode has the highest O 2 evolution potential (OEP) and lowest charge transfer resistance, suggesting that it has the lower energy consumption than the other three kinds of electrodes. Electrochemical oxidation methyl orange (MO) as a model dye wastewater was studied to evaluate the potential applications of this modified electrode in environmental science. It was found that the Ce-Nd-PbO 2 electrode exhibited higher MO and chemical oxygen demand (COD) removal efficiency than single-doped and pure PbO 2 electrodes.
研究领域:
环境科学
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电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jinhong Song,Chen Zhang,Zejian Zheng,Shizhe Huo,Yihan Lin,Fei Yang,Lei Liu
SnO 2 layer between Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) and lithium anode was prepared through simple scratch-coating process to improve interface properties. The physical phase, morphology, and electrochemical properties of Li/SnO 2 /LAGP structure were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical analytical methods. It was found that SnO 2 layer effectively improved the interface stability of LAGP and lithium anode. The prepared Li/SnO 2 /LAGP/SnO 2 /Li symmetric cell exhibited a large critical current density of 1.8 mA cm −2 and demonstrated excellent cycling characteristics. The polarization voltages of symmetric cell were 0.1 V and 0.8 V after 1000 h of cycling at current densities of 0.04 mA cm −2 and 0.5 mA cm −2 , respectively. Li/SnO 2 @LAGP/LiFePO 4 solid-state full cells were also assembled, exhibiting a discharge specific capacity of 150 mAh g −1 after 200 cycles at 0.1C with capacity retention rate of 96 %. The good interface properties of Li/SnO 2 /LAGP structure are attributed to the transformation of SnO 2 layer into a buffer layer containing Li 2 O, Sn 0 , and Li x Sn y alloy during cycling process, which effectively inhibits the reduction reaction between LAGP and lithium anode.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Nano Select
·
2021
·Vol. 3
·期 5
·956-964
·
IF 0
Mengjia Li,Lihua Zhu,Xian Zhang,Chen Wang,Deyu Gao,Jiaheng Han,Chunlei Chen,Hongwei Song,Sai Xu,Cong Chen
Owing to the significant roles in balancing carrier transport, bandgap alignment, and perovskite crystallization, realizing high-quality electron transport layers (ETLs) and their effective electronic contact with the perovskite photoactive layer is crucial for future commercialization of perovskite solar cells (PSCs). Here, a high-quality SnO 2 ETL is firstly deposited at room temperature via the low-cost electron beam evaporation (E-beam) technology to help achieve an impressive PCE of 18.88% for rigid PSCs and a PCE of 15.73% for flexible devices. Then we introduced a novel passivating ligand molecule, 11 Maleimidoundecanoic acids (11MA), to help induce functional defects passivation at the interface of SnO 2 /Perovskite to coordinate with Pb 2+ in perovskite and Sn 4+ in SnO 2 via the functional groups (-C = O, -COOH). As a result, 11MA could help achieve the best PCE of 20.94% with negligible hysteresis for rigid devices. Also, doping 11MA in the perovskite photoactive layer further enhanced the PCE to 22.08% with much improved 2000 hours ambient stabilities. Finally, we fabricated different large-area rigid devices (10, 40, 100, and 600 mm 2 ) toward speeding up the commercialization of PSCs by industrial E-beam technology and rational defects passivation strategies.
研究领域:
材料科学
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能源技术
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纳米技术
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光电工程
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 5
·2140-2155
·
IF 4.5
Zhang Yeguang,Li Yingchao,Liu Wenxin,Li Feihu,Zhan Zili
CH 4 sensors based on metal oxide semiconductors (MOS) provide high sensitivity and fast response, but the sensitivity will be lost when they are poisoned by silicone. Therefore, there is an urgent need to address the poisoning deactivation of MOS gas sensors caused by silicone. Here, the unique strategy of coating a reactive anti-poisoning material onto the surface of the sensing material is proposed to effectively improve the anti-poisoning ability without degrading the gas sensing performance. As an experimental verification, SnO 2 /α-Al 2 O 3 is designed as the anti-poisoning layer and SnO 2 loaded with precious metals (Pt and Pd) as the sensing layer. Owing to the protection of the anti-poisoning layer, the response ( R a / R g = 24.69) and the response/recovery time (1/24 s) of the sensor to CH 4 remained undiminished at 364 °C after being poisoned under an air/hexamethyldisiloxane (HMDSO) (10 ppm) environment for 40 min, which meets the requirements of the Chinese National Standard (GB 15322.2-2019). The mechanism analysis shows that HMDSO can be decomposed with the adsorbed oxygen on the surface of SnO 2 in the anti-poisoning layer, and CH 4 can diffuse into the sensing layer to be detected. The unique anti-poisoning strategies can provide a promising insight for improving the poisoning tolerance of MOS gas sensors. Graphical abstract
研究领域:
材料科学
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化学工程
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传感技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Liupeng Zhao,Xueqin Gong,Wei Tao,Tianshuang Wang,Xiaomin Liu,Fangmeng Liu,Xu Yan,Chenguang Wang,Peng Sun,Geyu Lu
A challenge for low-valence cation doping in SnO 2 materials is that the sharply elevated baseline resistance is detrimental to sensor stability and the subsequent signal acquisition. In contrast, Homovalent doping has little effect on resistance but the effective homovalent dopant is few. Herein, we find the non-metallic element Se is prone to form cationic Se Sn defects in SnO 2 , which can improve the sensitivity of the SnO 2 -based sensors with a moderate rise in baseline resistance. The homovalent Se doping make the species and ratio of adsorbed oxygen on Se-doped SnO 2 surface basically unchanged after doping. Further experiments and theoretical calculations confirm the sensitization mechanism of Se-doped SnO 2 can be attributed to the higher activity of adsorbed oxygen on its surface. Therefore, the sensor based on Se-doped SnO 2 can have sufficient sensing-reactions and charge transfer at a temperature close to the maximum value of the baseline resistance, which makes the sensor better to sensitize the target gases requiring high temperature for sensing-reactions. This noble metal-like activation behavior of Se dopant is derived from the easier breaking of Se-O bond compared to Sn-O bond during CO oxidation which provides a new basis for the selection of dopants from the perspective of bond energy.
研究领域:
材料科学
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传感器技术
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化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Li Luo,Zhen Fan,Zhaobin Zhang,Danyang Liu,Guofa Li,Lishuang Wang,Bingsuo Zou
SnO2 nanoparticles (NPs) have been used as an electron transport layer (ETL) in quantum dot light-emitting diodes (QLEDs) to achieve stable and high-performance devices. However, SnO2 NPs with high electron mobility cause the problem of imbalanced charge injection and transport in QLEDs. Meanwhile, the SnO2 NPs synthesized at low temperature have hydroxyl (−OH) groups, which could damage the performance of QLEDs. Here, Zn doping was applied to modulate the properties of SnO2 NPs and achieve better carrier balance in green CdSe/ZnS QLED. The maximum current efficiency (CE) of QLED with 5 wt % Zn-doped SnO2 NPs is 2.3-fold higher than that of SnO2-based QLED. In addition, a small-molecule 4,4′-bis(carbazole-9-yl)-1,1′-biphenyl (CBP)-mixed poly(9-vinylcarbazole) (PVK) layer was used as a hole transport layer to facilitate the hole injection and charge balance. As a result, a maximum external quantum efficiency (EQE) of 5.03% is obtained for the best performance device. The T50 lifetime at a luminance of 100 cd/m2, for a device based on 5 wt % Zn-doped SnO2 ETL, is 9141 h, which is 2.29-fold longer than the reference one. This work provides a new strategy to obtain high-performance and stable display arrays.
研究领域:
材料科学
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光电子学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jiawei Lei,Pingzhou Duan,Weijun Liu,Zhirong Sun,Xiang Hu
Due to the potential threatening of antibiotics in aqueous environment, a novel electro-oxidation (EO) — electro-Fenton (EF) —persulfate (PS) system with the addition of peroxydisulfate and Fe 2+ was installed for the degradation of cefotaxime. Ti/CNT/SnO 2 –Sb–Er with an ultra-high oxygen evolution potential (2.15 V) and enhanced electrocatalytic surface area was adopted as anode. The OH production and electrode stability test demonstrated great improvement in the electrochemical performances. Ni@NCNT cathode was tested with higher H 2 O 2 generation by the presence of nitrogen functionalities due to the acceleration of electron transfer of O 2 reduction. Experiment results indicated CNT and ErO 2 modification increased the molecular and TOC removal of cefotaxime. Coupling processes of EO-EF and EO-PS both resulted in shorter electrolysis time for complete cefotaxime removal, however, the mineralization ability of EO-PS process was lower than EO-EF, which might result from the immediate vanishing of PS. Thus, a further improved treatment EO-EF-PS system achieved an 81.6% TOC removal towards 50 mg L −1 cefotaxime after 4 h electrolysis, under the optimal working condition Fe 2+ = PS = 1 mM. The influence of current density and initial concentration on the performance of all processes was assessed. Methanol and tert-butanol were added in the system as OH and SO 4 − scavengers, which illustrating the mechanism of EO-EF-PS oxidizing process was the result of the two free radicals. Major intermediates were deduced and the degradation pathway of cefotaxime was analyzed. This research provides a potential coupling process with high antibiotic removal efficiency and effective materials for practical uses.
研究领域:
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chengdong Shi,Shuyan Yu,Congju Li
In recent years, tetracycline (TC) has become an emerging refractory antibiotic pollutant due to excessive use and abuse. The aim of this work is to prepare aligned carbon nanofibrous (ACFs) membrane by electrospinning technology and then dope with SnO 2 -Sb to electrocatalytic degrade TC. The in-situ growth of SnO 2 -Sb on the carbon nanofiber surface to fabricate SnO 2 -Sb/ACFs membrane can increase the oxygen evolution reaction potential and improve conductivity. And the SnO 2 -Sb/ACFs membrane was used as the anodic membrane of a flow-through mode electrochemical membrane reactor to remove TC in aqueous solutions. The outstanding degradation performance of SnO 2 -Sb/ACFs membrane on TC was investigated systematically. The results show that the 3-layer SnO 2 -Sb/ACFs-3 membranes can effectively degrade 20 mg/L TC at an applied potential of 2.5 V. Moreover, SnO 2 -Sb/ACFs-3 membrane shows excellent degradation stability after 10 cycles of degradation experiments. For exploring the possible TC degradation pathways, HPLC-MS was used to identify the main intermediates during the electrochemical oxidation process. The anodic membrane electrode prepared in this work puts forward a new idea for the safe and efficient degradation of TC.
研究领域:
环境科学
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材料科学
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电化学
·
水处理
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 2
·541-552
·
IF 4.39
Dong Fang,Linlin Zhang,Yongjian Niu,Yuanyuan Wang,Qingxiao Su,Jiao Wang,Cheng Wang
SnO2 is one of the most promising catalysts for CO2 electroreduction. However, the intrinsic low electrical conductivity and weak CO2 adsorption and activation capability have rendered the reaction kinetically sluggish and inefficient. To surmount these hurdles, herein, W was incorporated into SnO2 nanosheets to modulate the electronic structures. Compared with pristine SnO2, the p-band centre of W-doped SnO2 was elevated towards the Fermi level, accompanied by the reduction in the band gap and work function. As a result, both the CO2 adsorption and the electron transfer process were promoted, thus lowering the activation energy barrier for CO2 reduction. Benefitting from these, a maximum faradaic efficiency of 87.8% was achieved for HCOOH at −0.9 V vs. the RHE. Meanwhile, the current density and energy efficiency approached 20.92 mA cm−2 and 60%, respectively. Such performances could sustain for 14 h without obvious fading and exceeded pristine SnO2 and most reported Sn-based catalysts. Tafel slope and reaction order analyses further suggested that the reaction proceeded following a stepwise electron–proton transfer pathway with the formation of CO2˙− as the rate determining step. This work demonstrated the effectiveness of electronic structure tuning in promoting the catalytic performances of p-block metal oxides and contributed to the development of efficient catalysts for sustainable energy conversion and carbon neutrality.
研究领域:
材料科学
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电化学
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催化
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可持续能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Shixin Zhang,Huanqiao Song,Tianjiao Li,Mingsheng Luo,Yu Chen,Changke Shao
Developing catalysts for the stable electrooxidation of ethanol have been a goal pursued by scientists. The present work reports a facile synthesis of catalysts with a double junction structure of Pt and SnO 2 on graphene (Pt/SnO 2 GN) through sol–gel combined with glycol hydrothermal reduction method. The physicochemical analyses show that the reduced Pt uniformly dispersed on GN is located adjacent to SnO 2 and has electronic interaction with the composite carrier. The electrochemical results exhibit that Pt/SnO 2 GN has better catalytic performance for ethanol electrooxidation than PtSnO 2 /GN and PtSn/GN. The ethanol oxidation peak current density on Pt/SnO 2 GN, after 1500 cycles of voltammetric testing, can still maintain 99.2% of the highest. The excellent catalytic stability of Pt/SnO 2 GN is ascribed to the double junction structure and the appropriate interaction between Pt and SnO 2 on GN, which enlarge the ECSA of Pt, improve the structural integrity, accelerate the charge transfer kinetics and increase the CO tolerance.
研究领域:
电化学
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Luo Yang,Guo Huangying,Wan Wenyu,Deng Pengcheng,Zhang Haiwei,Zhou Xing
With the development of information technology, electromagnetic pollution has become a new source of pollution. Efficient EMI shielding materials are urgently needed to deal with this problem, and conductivity is the key to achieving efficient shielding. Impedance mismatch makes the composite shielding material obtain electromagnetic wave reflection dissipation ability, but excessive reflection loss will lead to secondary pollution of the environment. In this paper, polyaniline-modified graphene nanosheets (GNS@PANI) were used as conductive fillers, and tin oxide-coated ferric oxide (Fe 3 O 4 @SnO 2 ) with a shell–core structure was added to self-healing polyurethane (PU) as a magnetic conductive filler. The magnetic nanofiller with high permeability was used to improve the absorbing ability of the composite shielding material. When the addition amount of Fe 3 O 4 @SnO 2 is only 7 wt%, the composite film exhibits a high tensile strength of 5.22 MPa and an ultra-high self-healing efficiency of 89.66%, and the maximum EMI SE can reach 29 dB. Meanwhile, the SE A in the EMI SE is as high as 17 dB, and the SE R is only 12 dB, which is much lower than the SE A . To further enhance the electromagnetic wave absorption loss, we prepared a “sandwich” structure layered fabric using layer-by-layer assembly technology. This composite film has excellent electromagnetic absorption loss ability and has broad application prospects in the fields of medical devices, communication networks and flexible wearable electronics. Graphical abstract
研究领域:
材料科学
·
电磁兼容性
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纳米技术
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聚合物复合材料
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柔性电子
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Sai Yang,Yiran Lu,Xiaolong Wang,Jiahao Tian,Hongcai Yu,Chongan Chen,Haoxuan Guo,Yun Lin,Shulin Chen,Yongbo Yuan,Junhui Ran,Bin Yang
Significant open-circuit-voltage (VOC) loss is present in all-inorganic perovskite solar cells (e.g., based on CsPbI2Br), owing to energy level mismatch between the perovskite layer and charge transport layer. Here, cesium acetate (CsAc) was mixed with tin oxide (SnO2) to form a hybrid electron transport layer that can reduce the energy level mismatch with the CsPbI2Br perovskite layer. Ultraviolet photoelectron spectroscopy characterization suggested that the conduction band of the electron transport layer was elevated from −4.51 eV for the SnO2-only material to −3.64 eV for the CsAc/SnO2 hybrid form. This change due to the introduction of CsAc in the SnO2 layer to tune its conduction band is most likely attributed to the formation of a Cs+–Ac– dipole layer near the top surface of the CsAc/SnO2 hybrid electron transport layer. Additionally, the Cs+ ions in the top surface of the hybrid CsAc/SnO2 electron transport layer play a positive role in facilitating the growth of a follow-up CsPbI2Br perovskite layer with finer grains and a denser morphology. Compared to the SnO2-only electron transport layer-based device, CsPbI2Br solar cells based on CsAc/SnO2 exhibited a significantly improved photovoltaic performance. The VOC was increased from 1.11 V for the SnO2-only device to 1.28 V for the CsAc/SnO2 device, while the power conversion efficiency increased from 10.9% to 14.67%. This work presents a practicable approach through modifying the SnO2 layer with CsAc to significantly reduce the VOC loss by 0.17 V, which paves an important road to develop high-VOC CsPbI2Br perovskite solar cells.
研究领域:
光伏技术
·
材料科学
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纳米技术
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固体物理
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）